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Reinstalled Win7 but now PC doesn't 'see' my USB3 stick
Hi. I built my PC a few months ago, all was working fine but, for reasons I won't bore you with, I had to reinstall Win7. The PC case has 2 USB3 slots (the blue ones) on the front but when I insert my USB3 memory stick, nothing happens. Yet the old card reader which I took off my old PC case (USB2) reads the USB3 stick fine. I thought there may be some BIOS option to activate USB3 but I don't see anything like that.
Can anyone suggest what the problem/cure is? Many thanks if you can.
Also, how do I sort out all these warning triangles? I've right-clicked 'update drivers' but none were found by Windows. (The unknown device is probably that old card reader.) Thanks again.